NEET Chemistry States of Matter / पदार्थ की अवस्थाएँ - गैस एवं द्रव NEET PYQ-States Of Matter

  • question_answer
    Which of the following expressions correctly represents the relationship between the average molar kinetic energy, \[\overline{KE},\] of CO and \[{{N}_{2}}\] molecules at the same temperature?                    [AIPMT 2000]

    A)        \[{{\overline{KE}}_{\,CO}}\,<\,{{\overline{KE}}_{{{N}_{2}}}}\]         

    B)  \[{{\overline{KE}}_{\,CO}}\,>\,{{\overline{KE}}_{{{N}_{2}}}}\]

    C)  \[{{\overline{KE}}_{\,CO}}\,=\,{{\overline{KE}}_{{{N}_{2}}}}\]

    D)  Cannot be predicted unless volumes of die gases are given  

    Correct Answer: C

    Solution :

    \[KB=\frac{3}{2}\,RT\] (for one mole of a gas)
                The temperature is constant and kinetic energy is independent on molecular weights. So,
    \[{{\overline{KE}}_{CO}}={{\overline{KE}}_{{{N}_{2}}}}\]


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